JP2024027773A - Structure - Google Patents

Abstract

To provide a structure which comprises a first pressure-receiving part that receives one of a pressing force from an outside and a reaction force due to the pressing force, and also comprises a second pressure-receiving part that receives the other of the pressing force and the reaction force or connects to the second pressure-receiving part, the structure further appropriately achieving lower-magnitude stiffness in a given relative displacement range of the first and second pressure-receiving parts than in other displacement ranges.SOLUTION: A structure comprises a structure body including: a first support part having a first pressure receiving part; a pair of second and third support parts; a pair of fourth and fifth support parts having a second pressure receiving part; N1 pairs of first and second positive stiffness parts connected to the first support part and the second and third support parts; N1 pairs of third and fourth positive stiffness parts connected to the second and third support parts and the fourth and fifth support parts; and N2 pairs of first and second negative stiffness parts connected to the first support part and the fourth and fifth support parts. The structure body is formed as a planar member.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to structures.

Conventionally, a structure has been proposed that includes a mass body, a coil spring connected to the mass body and a bottom, and first and second elastic beams connected to the mass body and a frame and having opposite stiffnesses. (See Patent Document 1). Paragraph 0017 of Patent Document 1 states that "within a predetermined stroke range of the moving mass 2, the mass 2 is configured to experience a predetermined stiffness, and this predetermined stiffness can be zero stiffness or It is preferred that the stiffness be approximately zero."

Patent No. 6197251

In the structure disclosed in Patent Document 1, when the mass body tilts when vibrating in a predetermined direction passing through the mass body and the bottom, and the displacement of the mass body in the predetermined direction is not stable, the first , the stiffness of the second elastic beam may change from its original stiffness, and it may not be possible to appropriately achieve stiffness with a lower absolute value in a predetermined displacement range than in other displacement ranges.

The structure of the present disclosure includes a first pressure receiving part that receives one of an external pressing force and a reaction force due to the pressing force, and a second pressure receiving part that receives the other of the pressing force and the reaction force, or In a structure connected to the second pressure receiving part, rigidity with a lower absolute value is more appropriately realized in a predetermined relative displacement range between the first pressure receiving part and the second pressure receiving part than in other displacement ranges. The main purpose is to

The structure of the present disclosure takes the following measures to achieve the above-mentioned main purpose.

The structure of the present disclosure includes:
A first pressure receiving part that receives one of an external pressing force and a reaction force due to the pressing force, and a second pressure receiving part that receives the other of the pressing force and the reaction force, or the second pressure receiving part A structure connected to a part,
a first support portion having the first pressure receiving portion and at least a portion extending in a predetermined direction;
a pair of second and third support parts spaced apart on both sides with respect to the first support part and extending in the predetermined direction;
a pair of fourth and fifth support parts connected to the second pressure receiving part, located between the first support part and the second and third support parts, and at least partially extending in the predetermined direction; and,
A pair connected to the first support part and the second and third support parts and having positive rigidity in any relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. N1 (N1≧2) first and second positively rigid parts, respectively;
It is connected to the second and third support parts and the fourth and fifth support parts, and has positive rigidity in any relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. each of the N1 third and fourth positively rigid parts in a pair having;
A pair connected to the first support part and the fourth and fifth support parts and having negative rigidity in a predetermined relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. N2 (N2≧1) first and second negative rigid parts, respectively;
comprising a structure body having
The structure main body is formed as a planar member.
The gist is that.

The structure of the present disclosure includes a first rigid frame structure including a first support part, a second support part, and N1 first positively rigid parts; and a second rigid frame structure formed by a pair of parts. Further, a third rigid frame structure including a second support part, a fourth support part, and N1 third positively rigid parts, and a fourth rigid frame structure including a third support part, a fifth support part, and N1 fourth positively rigid parts. It is composed of a pair of Ramen structures. From these, when the first pressure receiving part receives one of an external pressing force and a reaction force due to the pressing force and the first supporting part (first pressure receiving part) vibrates in a predetermined direction, the first supporting part ( It is possible to prevent the first pressure receiving part from tilting toward the second support part or the third support part with respect to a predetermined direction. In addition, when the second pressure receiving part receives the other of the external pressing force and the reaction force due to the pressing force and the fourth and fifth supporting parts (second pressure receiving part) vibrate in a predetermined direction, the second supporting part (second pressure receiving part) can be prevented from tilting toward the second support part or the third support part with respect to a predetermined direction. Therefore, N2 first and second negative rigid parts are connected to the first support part (first pressure receiving part) and the fourth and fifth support parts respectively. Negative rigidity can be more appropriately exhibited within a predetermined displacement range relative to the fifth support portion (second pressure receiving portion) in a predetermined direction. As a result, in a predetermined relative displacement range in a predetermined direction between the first support part (first pressure receiving part) and the fourth and fifth support parts (second pressure receiving part), the absolute value is higher than in other displacement ranges. Low rigidity can be more appropriately achieved.

Moreover, in the structure of the present disclosure, the first, second, third, fourth, and fifth supporting parts, the N1 first, second, third, and fourth positively rigid parts, and the N2 positive rigid parts, respectively, are provided. 1. The structure main body having the second negative rigidity portion is formed as a planar member. As a result, when the fourth and fifth supporting parts connected to the first supporting part having the first pressure receiving part and the second pressure receiving part vibrate in a predetermined direction, compared to the case where the member is not formed as a planar member, , these can be suppressed from tilting in a direction perpendicular to the extending direction of the structure main body. Further, the length in the direction orthogonal to the extending direction of the structure main body can be shortened.

FIG. 2 is an external perspective view of the structure 20 viewed from the front left side. It is an external perspective view of the structure 20 seen from the right rear side. FIG. 2 is a front view of the structure 20 seen from the front side. It is a right side view of the structure 20 seen from the right side. FIG. 2 is an explanatory diagram showing an example of characteristics of a structure 20. FIG. FIG. 3 is a front view of the structure main body 121. FIG. 3 is a front view of the structure main body 221. FIG. 3 is a front view of the structure main body 321. FIG. 4 is an explanatory diagram showing a structure body 420 before a structure main body 421 and a support member 470 are fixed. FIG. 7 is an explanatory diagram showing a structure body 520 before a structure main body 521 and a support member 570 are fixed. FIG. 6 is an external perspective view of a structure 620. 6 is a top view of structure 620. FIG. 7 is an external perspective view of a structure device 710. FIG. 7 is a right side view of the structure device 710. FIG. FIG. 8 is a front view of a structure main body 821. FIG. 16 is an explanatory diagram illustrating a state in which the pillar parts 80 and 82 are moved downward relative to the vertically extending part 27 of the first support part 822 from the state shown in FIG. 15 in the structure main body 821. FIG. 8 is an explanatory diagram showing an example of characteristics of a structure main body 821. FIG. 8 is an explanatory diagram showing an example of characteristics of a structure main body 821.

Next, a mode for carrying out the present disclosure will be described using examples.

FIG. 1 is an external perspective view of a structure 20 as an example of the present disclosure, viewed from the front left side. FIG. 2 is an external perspective view of the structure 20 viewed from the right rear side. FIG. 3 is a front view of the structure 20 seen from the front side. FIG. 4 is a right side view of the structure 20 seen from the right side. Note that the left-right direction, front-back direction, and up-down direction are as shown in FIGS. 1 to 4.

As shown in FIGS. 1 to 4, the structure 20 of the embodiment as a whole is oriented with respect to a plane P (see FIG. 3) that passes through the center of the structure 20 in the left-right direction and extends in the front-rear direction and the up-down direction. It is formed to be a mirror image (left-right symmetrical), and includes a structure main body 21 and a support member (relative displacement suppressing section and sixth support section) 70 that supports the structure main body 21. The structure main body 21 is a one-piece body formed by, for example, injection molding, blow molding, extrusion molding, 3D printing of a resin material or rubber material, casting, forging, pressing, cutting, extrusion molding, 3D printing of a metal material, etc. It is constructed as a molded part. The support member 70, like the structure main body 21, is configured as an integrally molded member.

The structure main body 21 is formed as a planar member having a substantially constant thickness (length in the front-rear direction) and a substantially rectangular outer shape when viewed from the front side, and includes a first support portion 22 and a second support portion. part 30, third support part 32, fourth support part 40, fifth support part 45, two first beam parts (first positively rigid part) 50a, 50b, and two second beam parts portions (second positively rigid portions) 52a, 52b, two third beam portions (third positively rigid portions) 54a, 54b, and two fourth beam portions (fourth positively rigid portions) 56a, 56b. , one fifth beam part (first negative rigidity part) 60 and one sixth beam part (second negative rigidity part) 62.

The first support portion 22 is located at the center of the structure main body 21 in the left-right direction, and includes a vertically extending portion 23, an upper left-right extending portion 24, and a lower left-right extending portion 26. The vertically extending portion 23 extends in the vertical direction along the plane P. The upper left-right extending portion 24 extends symmetrically from the upper end of the up-down extending portion 23 in the left-right direction. The upper end surface 25 of the upper left-right extending portion 24 is formed as a flat surface. The lower left-right extending portion 26 extends symmetrically from the lower end of the up-down extending portion 23 in the left-right direction.

The second and third supporting parts 30 and 32 are formed in a pair, and are spaced apart from each other by the same distance on the left and right sides of the vertically extending part 23 of the first supporting part 22, respectively, and in the vertical direction. Extending. The upper end portions of the second and third support portions 30 and 32 face the upper left-right extending portion 24 of the first support portion 22 in the left-right direction. The lower end portions of the second and third support portions 30 and 32 face the lower left-right extending portion 26 of the first support portion 22 in the left-right direction.

The fourth and fifth support parts 40 and 45 are formed in a pair, and are located between the vertically extending part 23 of the first support part 22 and the second and third support parts 30 and 32 in the left-right direction, respectively. positioned. The fourth and fifth supporting parts 40 and 45 have vertically extending parts (first and second pillar parts) 41 and 46 and left and right extending parts (third and fourth pillar parts) 42 and 47, respectively. have The vertically extending portions 41 and 46 are spaced apart from the vertically extending portion 23 by the same distance on the left and right sides, respectively, and between the upper leftward and rightward extending portion 24 and the lower leftward and rightward extending portion 26 in the vertical direction. located and extends vertically. The vertically extending portions 41 and 46 overlap the upper leftward and rightward extending portions 24 and the lower leftward and rightward extending portions 26, respectively, when viewed in the vertical direction. The left end surface of the vertically extending section 41 is flush with the left end surface of the upper horizontally extending section 24 and the left end surface of the lower horizontally extending section 26, and the right end surface of the vertically extending section 46 is It is flush with the right end surface of the upper left-right extending portion 24 and the right end surface of the lower left-right extending portion 26 . The vertically extending portions 41 and 46 are both fixed to the support member 70 on the back side. The left and right extending portions 42 and 47 extend from the upper ends of the vertically extending portions 41 and 46 toward the left side and the right side (second and third support portions 30 and 32 sides), respectively, to the second and third support portions 30 and 47, respectively. 32 to a position spaced the same distance apart. The upper end surfaces of the vertically extending portion 41 and the horizontally extending portion 42 are formed to be inclined downward from the second support portion 30 side toward the vertically extending portion 23 side. The upper end surface of the left-right extending portion 47 is formed to be inclined downward from the third support portion 32 side toward the vertically extending portion 23 side. An upper projecting portion 42a extending upward is formed at the left end portion (end portion on the second support portion 30 side) of the left and right extending portion 42, and an upper projecting portion 42a extending upwardly is formed at the left end portion (end portion on the second support portion 30 side) of the left and right extending portion 42. An upper projecting portion 47a extending upward is formed at the end on the side of the portion 32).

The two first beam portions (first positively rigid portions) 50a, 50b and the two second beam portions (second positively rigid portions) 52a, 52b are formed in a pair, and each extends in a straight line in the left-right direction. It extends in a shape. The first beam portion 50a is connected to the left end portion of the upper left-right extending portion 24 of the first support portion 22 and the upper end portion of the second support portion 30. The first beam portion 50b is connected to the left end portion of the lower left-right extending portion 26 of the first support portion 22 and the lower end portion of the second support portion 30. The second beam portion 52 a is connected to the right end portion of the upper left-right extending portion 24 and the upper end portion of the third support portion 32 . The second beam portion 52b is connected to the right end portion of the lower left-right extending portion 26 and the lower end portion of the third support portion 32.

The two third beam portions (third positively rigid portions) 54a, 54b and the two fourth beam portions (fourth positively rigid portions) 56a, 56b are formed in a pair, and each extends in a straight line in the left-right direction. It extends in a shape. The two third beam portions 54a and 54b are arranged side by side at intervals in the vertical direction, and are connected to the left end portion of the vertically extending portion 41 and the second support portion 30. The two fourth beam portions 56a and 56b are arranged side by side at intervals in the vertical direction, and are connected to the right end portion of the vertically extending portion 46 and the third support portion 32.

The two first beam portions 50a, 50b, the two second beam portions 52a, 52b, the two third beam portions 54a, 54b, and the two fourth beam portions 56a, 56b are arranged in the left-right direction (extension). They are formed to have the same length in the direction of travel. Furthermore, the two first beam parts 50a, 50b and the two third beam parts 54a, 54b completely overlap when viewed in the vertical direction, and the two second beam parts 52a, 52b and the two third beam parts 54a, 54b completely overlap each other when viewed in the vertical direction. The fourth beam portions 56a and 56b completely overlap when viewed in the vertical direction. As a result, a first rigid-frame structure including the first support part 22, the second support part 30, and the two first beam parts 50a and 50b, and a first rigid-frame structure including the first support part 22, the third support part 32, and the two second A second rigid-frame structure made up of the beam parts 52a and 52b is configured in pairs in the left-right direction, and a third rigid-frame structure made up of the second support part 30, the fourth support part 40, and two third beam parts 54a and 54b. The rigid-frame structure and the fourth rigid-frame structure including the third support part 32, the fifth support part 45, and the two fourth beam parts 56a and 56b are configured as a pair in the left-right direction.

The fifth and sixth beam portions (first and second negative rigidity portions) 60 and 62 are formed in pairs, and are respectively connected to the upper left and right extending portions 24 in the vertically extending portion 23 of the first support portion 22. , and the upper end portions of the left and right extending portions 42 and 47 of the fourth and fifth supporting portions 40 and 45, respectively, and the upper end portions of the upper projecting portions 42a and 47a. The fifth and sixth beam portions 60 and 62 respectively extend diagonally downward in a sine wave shape from the vertically extending portion 23 side toward the upper projecting portions 42a and 47a side. The fifth beam portion 60 partially overlaps the two first beam portions 50a, 50b and the two third beam portions 54a, 54b when viewed in the vertical direction, and the sixth beam portion 62 partially overlaps the two first beam portions 50a, 50b and the two third beam portions 54a, 54b. The second beam portions 52a, 52b and the two fourth beam portions 56a, 56b partially overlap when viewed in the vertical direction. The upper end surfaces of the vertically extending portion 41 and the horizontally extending portion 42 described above are inclined downward (to the side opposite to the fifth beam portion 60 side) from the second support portion 30 side toward the vertically extending portion 23 side. It is formed to do so. Further, the upper end surfaces of the vertically extending portion 46 and the horizontally extending portion 47 are inclined downward (to the side opposite to the sixth beam portion 62 side) as they go from the third support portion 32 side to the vertically extending portion 23 side. It is formed to do so.

The support member (relative displacement suppressing part and sixth support part) 70 has a base 71, convex parts (first and second convex parts) 72a and 72b, and a pedestal part 73. The base 71 extends in the vertical direction on the back side of the structure main body 21. The protrusions 72a and 72b extend in pairs from the left and right ends of the upper end of the base 71 toward the front. The support member 70 is secured by fastening members such as bolts and nuts with the front end surfaces of the convex portions 72a and 72b in contact with the rear end surfaces of the vertically extending portions 41 and 46 of the fourth and fifth support portions 40 and 45. It is fixed to the vertically extending parts 41 and 46. As a result, the fourth and fifth support parts 40 and 45 are connected via the support member 70, so that the support member 70 suppresses relative displacement between the fourth and fifth support parts 40 and 45. Can be done. The pedestal portion 73 extends forward from the lower end of the base portion 71 to a position that is the same as or slightly forward of the front end surface of the structure main body 21 . The lower end surface 74 of the pedestal portion 73 is formed as a flat surface.

In the structure 20 of the example, a first support part 22, a pair of second support parts 30 and third support parts 32, a pair of fourth support parts 40 and a fifth support part 45, and a pair of two support parts The first beam portions 50a, 50b, the two second beam portions 52a, 52b, the pair of the two third beam portions 54a, 54b, the two fourth beam portions 56a, 56b, and the pair of the fifth beam It is formed as a planar member having a section 60 and a sixth beam section 62. Thereby, the length of the structure main body 21 in the direction (front-back direction) orthogonal to the extending direction of the structure main body 21 can be shortened compared to the case where the structure main body 21 is not formed as a planar member. Further, in the structure 20 of the example, the two first beam portions 50a, 50b, the two third beam portions 54a, 54b, and the fifth beam portion 60 partially overlap when viewed in the vertical direction. At the same time, the two second beam parts 52a, 52b, the two fourth beam parts 56a, 56b, and the sixth beam part 62 partially overlap when viewed in the vertical direction. As a result, the two first beam parts 50a, 50b, the two third beam parts 54a, 54b, and the fifth beam part 60 do not overlap when viewed in the vertical direction, and the two second beam parts 52a, 52b Moreover, the length of the structure main body 21 in the left-right direction can be shortened compared to a structure in which the two fourth beam parts 56a, 56b and the sixth beam part 62 do not overlap when viewed in the vertical direction.

In the structure 20 of the embodiment, the first support portion 22 (in particular, the upper left and right extending portions 24) functions as a first pressure receiving portion that receives one of the vertical pressing force and the reaction force due to the pressing force from the outside. do. Further, the support member 70 (in particular, the pedestal part 73) functions as a second pressure receiving part that receives the other of the vertical pressing force and the reaction force due to the pressing force from the outside, and the fourth and fifth supporting parts 40, 45 is connected to the second pressure receiving section. For example, the structure 20 is arranged in the orientation shown in FIGS. 1 to 4, the pedestal part 73 of the support member 70 is supported by the base member, and the upper left and right extending parts 24 of the first support part 22 of the structure body 21 are When the mount member is supported and the mount member vibrates in the vertical direction, the first support part 22 (first pressure receiving part) receives a vertical pressing force (downward load) from the outside, and the support member 70 (second pressure receiving part) part) receives the reaction force of the pressing force. Further, the structure 20 is arranged in an upside-down direction from the orientation shown in FIGS. When the pedestal part 73 supports the mount member and the mount member vibrates in the vertical direction, the support member 70 (second pressure receiving part) receives a vertical pressing force (downward load) from the outside, and the first support part 22 (first pressure receiving part) receives the reaction force of the pressing force.

Next, the operation of the structure 20 of the example will be explained. In the former case described above, specifically, the structure 20 is arranged in the orientation shown in FIGS. A case in which the upper left and right extending portions 24 of 22 support the mount member and the mount member vibrates in the vertical direction will be described. In this case, when a downward load acts on the first support part 22 of the structure 20 from the outside, the first support part 22 moves downward and the two first beam parts 50a, 50b and 2 The second beam portions 52a and 52b deform as a pair, and the fifth beam portion 60 and the sixth beam portion 62 deform as a pair. As the second support part 30 and the third support part 32 move in the vertical direction due to the deformation of the two first beam parts 50a, 50b and the two second beam parts 52a, 52b, the two first beam parts 50a, 50b and the two second beam parts 52a, 52b move in the vertical direction. The three beam portions 54a, 54b and the two fourth beam portions 56a, 56b are deformed as a pair. In these cases, the two first beam parts 50a, 50b, the two second beam parts 52a, 52b, the two third beam parts 54a, 54b, and the two fourth beam parts 56a, 56b are as follows. It has positive rigidity in any range of relative displacement in the vertical direction between the first support part 22 (first pressure receiving part), the fourth and fifth support parts 40 and 45, and the support member 70 (second pressure receiving part). Further, the fifth and sixth beam portions 60 and 62 have negative rigidity within a predetermined relative displacement range in the vertical direction between the first support portion 22, the fourth and fifth support portions 40 and 45, and the support member 70. It also has positive rigidity in other displacement ranges. Note that when the fourth and fifth supporting parts 40 and 45 and the supporting member 70 are not displaced in the vertical direction, the relative relationship between the first supporting part 22 and the fourth and fifth supporting parts 40 and 45 and the supporting member 70 in the vertical direction is The displacement can be considered as a displacement of the first support portion 22 from its initial position.

In the structure 20 of the example, the first support part 22 and the fourth and fifth support parts 40 and 45 are the two first beam parts 50a and 50b, the two second beam parts 52a and 52b, and the fourth and fifth support parts 40 and 45. A first path via the second support section 30 and the third support section 32, the two third beam sections 54a, 54b and the two fourth beam sections 56a, 56b, and the fifth beam section 60 and the sixth beam section. and a second path via 62. The rigidity of the structure 20 (structure main body 21) is determined by the two first beam parts 50a, 50b, the two second beam parts 52a, 52b, and the two third beam parts 54a, 54b and 2. It is determined by the sum of the rigidities of the fourth beam portions 56a and 56b, the fifth beam portion 60, and the sixth beam portion 62. Thereby, in the structure 20, rigidity (for example, approximately zero rigidity) whose absolute value is sufficiently lower in the predetermined displacement range of the first support portion 22 than in other displacement ranges is achieved.

Specifically, in the structure 20 of the embodiment, as described above, the first rigid-frame structure and the second rigid-frame structure are configured as a pair in the left-right direction, and the third rigid-frame structure and the fourth rigid-frame structure are configured as a pair in the left-right direction. By being configured in pairs, when the first support part 22 vibrates in the vertical direction, generation of force in the left and right directions on the structure 20 is suppressed, and the first support part 22 is prevented from tilting in the left and right direction. can be suppressed. Furthermore, since the structure main body 21 is formed as a planar member, when the first support part 22 vibrates in the vertical direction, the structure main body 21 is allowed to vibrate in the direction perpendicular to the extending direction of the structure main body 21 (back and forth) This makes it possible to suppress the generation of force (in the direction) and suppress the first support portion 22 from tilting in the front-rear direction. As a result, in the structure 20, the first support portion 22 can be allowed to move only in the vertical direction (sufficiently suppress inclination (movement) in the left-right direction and the front-back direction). The sections 60 and 62 can more appropriately exhibit negative rigidity within a predetermined displacement range of the first support section 22. As a result, the structure 20 can more appropriately achieve rigidity (for example, approximately zero rigidity) whose absolute value is sufficiently lower in the predetermined displacement range of the first support portion 22 than in other displacement ranges.

Further, in the structure 20 of the embodiment, the upper end surfaces of the vertically extending portion 41 and the leftwardly extending portion 42 extend downwardly (the fifth beam portion) from the second support portion 30 side toward the vertically extending portion 23 side. 60 side), and the upper end surfaces of the vertically extending section 46 and the leftwardly extending section 47 slope downward as they go from the third support section 32 side toward the vertically extending section 23 side. It is formed so as to be inclined toward the side (the side opposite to the sixth beam portion 62 side). As a result, the fifth and sixth beam parts 60 and 62 are deformed as a pair as the first support part 22 moves downward while ensuring the strength of the fourth and fifth support parts 40 and 45. At this time, it is possible to prevent the fifth and sixth beam sections 60 and 62 from coming into contact with the upper end surfaces of the vertically extending sections 41 and 46 and the left and right extending sections 42 and 47. As a result of the latter, the movable range of the fifth and sixth beam parts 60 and 62 and, in turn, the movable range of the first support part 22 in the vertical direction can be made larger.

FIG. 5 is an explanatory diagram showing an example of the characteristics of the structure 20 of the example when the support member 70 is supported by the base member and the first support part 22 of the structure main body 21 supports the mount member. . In the figure, the vertical axis is the reaction force [N] that acts on the base member from the structure 20, and the horizontal axis is the displacement (movement amount in the vertical direction) of the first support part 22 from the initial position [mm]. be. Moreover, in the figure, the broken line is the theoretical value of the structure 20, and the solid line is the analytical value of the structure 20. From the analysis values in FIG. 5, it is found that the structure 20 has a rigidity (for example, approximately It can be seen that zero stiffness) can be appropriately achieved.

The structure 20 of the embodiment is arranged upside down from the orientation shown in FIGS. 1 to 4, and the upper left and right extending portions 24 of the first support portion 22 of the structure body 21 are supported by the base member, and the support member The case where the pedestal part 73 of 70 supports the mount member and the mount member vibrates in the vertical direction is as follows. The first rigid-frame structure and the second rigid-frame structure are configured as a pair in the left-right direction, and the third rigid-frame structure and the fourth rigid-frame structure are configured as a pair in the left-right direction. When the fifth support parts 40 and 45 vibrate in the vertical direction, generation of force in the left and right directions on the structure 20 is suppressed, and the support member 70 and the fourth and fifth support parts 40 and 45 are tilted in the left and right directions. can be suppressed. Further, since the structure main body 21 is formed as a planar member and the pedestal portion 73 of the support member 70 is also present on the upper side of the structure main body 21, the support member 70 and the fourth and fifth supports When the parts 40 and 45 vibrate in the vertical direction, force is suppressed from being generated in the structure 20 in a direction (back and forth direction) orthogonal to the extending direction of the structure main body 21, and the support member 70, the fourth, It is possible to suppress the fifth support portions 40, 45 from tilting in the front-rear direction. As a result, in the structure 20, the fourth and fifth support parts 40 and 45 can be allowed to move only in the vertical direction (sufficiently suppress tilting (movement) in the left-right direction and front-back direction). 5. The sixth beam portions 60 and 62 can more appropriately exhibit negative rigidity within the predetermined displacement range of the fourth and fifth support portions 40 and 45. As a result, the structure 20 more appropriately realizes rigidity (for example, approximately zero rigidity) whose absolute value is sufficiently lower in the predetermined displacement range of the fourth and fifth supporting parts 40 and 45 than in other displacement ranges. can do.

The structure 20 of the embodiment described above has a first rigid frame structure including the first support part 22, the second support part 30, and the two first beam parts 50a and 50b, and a first rigid frame structure including the first support part 22 and the third support part 30. A second rigid-frame structure consisting of the section 32 and the two second beam sections 52a and 52b are configured as a pair in the left-right direction, and the second support section 30, the fourth support section 40, and the two third A third rigid-frame structure including the beam portions 54a and 54b, and a fourth rigid-frame structure including the third support portion 32, the fifth support portion 45, and two fourth beam portions 56a and 56b are configured in pairs in the left-right direction. has been done. This prevents the first support portion 22 from tilting in the left-right direction when vibrating in the vertical direction, and preventing the fourth and fifth support portions 40 and 45 from tilting in the left-right direction when vibrating in the vertical direction. can be suppressed. Therefore, the fifth and sixth beam parts 60 and 62 can more appropriately exhibit negative rigidity within the predetermined displacement range of the first support part 22. As a result, the structure 20 has a predetermined relative displacement range in a predetermined direction between the first support portion 22 and the support member 70 and the fourth and fifth support portions 40 and 45 than in other displacement ranges. Stiffness with a low absolute value (for example, substantially zero stiffness) can be more appropriately achieved.

Further, in the structure 20 of the example, the first support portion 22, the pair of second support portions 30 and third support portions 32, the pair of fourth support portions 40 and fifth support portions 45, and the pair of second support portions 30 and third support portions 32, the first beam portions 50a, 50b and the two second beam portions 52a, 52b; the pair of the two third beam portions 54a, 54b; the two fourth beam portions 56a, 56b; The structure main body 21 having the fifth beam portion 60 and the sixth beam portion 62 is formed as a planar member. Thereby, the length of the structure main body 21 in the direction (front-back direction) orthogonal to the extending direction of the structure main body 21 can be shortened compared to the case where the structure main body 21 is not formed as a planar member. Moreover, the first support part 22 is suppressed from tilting in the front-rear direction when vibrating in the vertical direction, and the fourth and fifth support parts 40 and 45 are prevented from tilting in the front-rear direction when vibrating in the vertical direction. can be suppressed.

Furthermore, in the structure 20 of the example, the two first beam parts 50a, 50b, the two third beam parts 54a, 54b, and the fifth beam part 60 partially overlap when viewed in the vertical direction. At the same time, the two second beam parts 52a, 52b, the two fourth beam parts 56a, 56b, and the sixth beam part 62 partially overlap when viewed in the vertical direction. As a result, the two first beam parts 50a, 50b, the two third beam parts 54a, 54b, and the fifth beam part 60 do not overlap when viewed in the vertical direction, and the two second beam parts 52a, 52b Moreover, the length of the structure main body 21 in the left-right direction can be shortened compared to a structure in which the two fourth beam parts 56a, 56b and the sixth beam part 62 do not overlap when viewed in the vertical direction.

In addition, in the structure 20 of the example, the structure body 21 is integrally molded. This eliminates the need for joints between the various parts of the structure main body 21, so that it is possible to avoid the effects of such joints, such as variations in the characteristics of the structure main body 21.

In the embodiment, in the structure main body 21 of the structure 20, the first support part 22 and the second support part 30 are connected by two first beam parts 50a and 50b, and the first support part 22 and the third support part 30 are connected by two first beam parts 50a and 50b. part 32 is connected by two second beam parts 52a, 52b, the second support part 30 and fourth support part 40 are connected by two third beam parts 54a, 54b, and the third support part 32 is connected by two third beam parts 54a, 54b. and the fifth support part 45 are connected by two fourth beam parts 56a and 56b, the first support part 22 and the fourth support part 40 are connected by one fifth beam part 60, and the first support part 22 and the fourth support part 40 are connected by one fifth beam part 60. The portion 22 and the fifth support portion 45 are connected by one sixth beam portion 62. However, the number of first beam portions (first positively rigid portion), the number of second beam portions (second positively rigid portion), the number of third beam portions (third positively rigid portion), and the number of fourth beam portions (third positively rigid portion) are different from each other. The number of (4) positive rigid portions may be two or more and the same as each other. Further, the number of fifth beam portions (first negative rigidity portions) and the number of sixth beam portions (second negative rigidity portions) may be one or more and the same as each other. For example, the structure bodies 121, 221, and 321 of the modified examples shown in FIGS. 6 to 8 may be used. 6 to 8 are front views of the structure body 121, 221, 321.

The structure main body 121 of the modified example of FIG. 6 has one first beam part 50c, one second beam part 52c, one third beam part 54c and one This corresponds to the sum of the fourth beam portions 56c. The first beam portion 50c is arranged side by side with the first beam portion 50b at an interval in the vertical direction, and is connected to the left end portion of the lower left and right extending portion 26 of the first support portion 22 and the second support portion 30. has been done. The second beam portion 52c is arranged side by side with the second beam portion 52b at an interval in the vertical direction, and is connected to the right end portion of the lower left and right extending portion 26 of the first support portion 22 and the third support portion 32. has been done. The third beam portion 54c is arranged between the two third beam portions 54a and 54b in the vertical direction, and is connected to the left end portion of the vertically extending portion 41 of the fourth support portion 40 and the second support portion 30. ing. The fourth beam portion 56c is arranged between the two fourth beam portions 56a and 56b in the vertical direction, and is connected to the right end of the vertically extending portion 46 of the fifth support portion 45 and the third support portion 32. ing. The first beam portion 50c, the second beam portion 52c, the third beam portion 54c, and the fourth beam portion 56c all extend in the left-right direction, and the two first beam portions 50a, 50b and 2 The two second beam portions 52a, 52b, the two third beam portions 54a, 54b, and the two fourth beam portions 56a, 56b are formed to have the same length. In the structure main body 121, stress concentration can be suppressed while increasing the rigidity of the first, second, third, and fourth beam parts, and thus the rigidity of the structure main body 121, compared to the structure main body 21. .

The structure main body 221 of the modified example in FIG. 7 corresponds to the structure main body 21 of the structure 20 plus one fifth beam portion 60b and one sixth beam portion 62b. The fifth beam portion 60b is arranged side by side with the fifth beam portion 60 at an interval in the vertical direction, and is connected to the vertically extending portion 23 and the upper projecting portion 42a of the left-right extending portion 42. The sixth beam portion 62b is arranged side by side with the sixth beam portion 62 at intervals in the vertical direction, and is connected to the vertically extending portion 23 and the upper projecting portion 47a of the left-right extending portion 47. The fifth and sixth beam portions 60b and 62b are formed in the same shape as the fifth and sixth beam portions 60 and 62, respectively. In the structure main body 221, stress concentration can be suppressed while increasing the rigidity of the fifth and sixth beam parts and thus the rigidity of the structure main body 221 compared to the structure main body 21.

The structure main body 321 of the modified example of FIG. 8 has one first beam portion 50c, one second beam portion 52c, one third beam portion 54c and one This corresponds to the sum of four fourth beam portions 56c, one fifth beam portion 60b, and one sixth beam portion 62b. One first beam portion 50c, one second beam portion 52c, one third beam portion 54c, and one fourth beam portion 56c are the same as the structure main body 121 in FIG. One fifth beam portion 60b and one sixth beam portion 62b are similar to the structure body 221 in FIG. 7.

In the embodiment, the structure 20 includes two first beam portions 50a, 50b, two third beam portions 54a, 54b, and a fifth beam portion 60, which partially overlap when viewed in the vertical direction. It is assumed that the two second beam parts 52a, 52b, the two fourth beam parts 56a, 56b, and the sixth beam part 62 partially overlap when viewed in the vertical direction. However, the two first beam parts 50a, 50b, the two third beam parts 54a, 54b, and the fifth beam part 60 do not overlap when viewed in the vertical direction, and the two second beam parts 52a, 52b and The two fourth beam portions 56a, 56b and the sixth beam portion 62 may not overlap when viewed in the vertical direction.

In the embodiment, in the structure 20, the upper end surfaces of the vertically extending part 41 and the leftwardly extending part 42 of the fourth support part 40 are arranged so that the upper end surfaces thereof are lower ( The upper end surfaces of the vertically extending portion 46 and the leftwardly extending portion 47 of the fifth support portion 45 extend vertically from the third support portion 32 side. It is formed so as to be inclined downward (on the side opposite to the sixth beam portion 62 side) as it goes toward the existing portion 23 side. However, the upper end surfaces of the vertically extending portion 41 and the left-right extending portion 42 and the upper end surfaces of the vertically extending portion 46 and the left-right extending portion 47 are each formed to extend in the left-right direction. Good too.

In the embodiment, in the structure 20, the fourth and fifth support parts 40 and 45 of the structure main body 21 and the support member 70 are fastened by a fastening member. However, the fourth and fifth support parts 40 and 45 and the support member 70 may be joined by welding or the like.

In the embodiment, in the structure 20, the front end surfaces of the convex portions 72a, 72b of the support member 70 are in contact with the rear end surfaces of the vertically extending portions 41, 46 of the fourth and fifth support portions 40, 45. In the state in which they are in contact with each other, they are fixed to the vertically extending portions 41 and 46 using fastening members such as bolts and nuts. However, it is not limited to this. For example, structures 420 and 520 in modified examples shown in FIGS. 9 and 10 may be used. FIG. 9 is an explanatory diagram showing the structure body 420 before the structure body 421 and the support member 470 are fixed, and FIG. 10 is an explanatory diagram showing the structure body 520 before the structure body 521 and the support member 570 are fixed FIG. 2 is an explanatory diagram showing the situation.

The structure 420 of the modified example of FIG. 9 differs from the structure 20 in that the structure body 21 and the support member 70 are replaced with a structure body 421 and a support member 470. The structure main body 421 differs from the structure main body 21 in that the fourth and fifth support parts 40 and 45 are replaced with fourth and fifth support parts 440 and 445. The fourth and fifth support parts 440 and 445 differ from the fourth and fifth support parts 40 and 45 in that recesses 41a and 46a are formed on the back surfaces of the vertically extending parts 41 and 46, respectively. The recesses 41a, 46a are rectangularly recessed from the back surface of the vertically extending portions 41, 46 toward the front surface thereof. The support member 470 differs from the support member 70 in that the protrusions 72a and 72b are formed in a shape that can be inserted and fitted into the recesses 41a and 46a. In the structure 420, the support member 470 is fixed to the vertically extending parts 41, 46 by fastening members such as bolts and nuts, with the protrusions 72a, 72b inserted and fitted into the recesses 41a, 46a.

In this way, the convex portions 72a and 72b of the support member 470 are fitted into the recesses 41a and 46a of the fourth and fifth support portions 440 and 445, so that the first support portion 22 may vibrate and the support member 70 and the fourth and fifth supporting parts 440 and 445 vibrate, the force acting on the fastening member compared to the structure 20 causes the fourth and fifth supporting parts 440 and 445 and the supporting member 70 to vibrate. It is possible to further suppress relative positional deviation from occurring. As a result, the support member 470 can more fully suppress relative displacement of the fourth and fifth support parts 440 and 445.

The structure 420 of the modified example of FIG. 10 differs from the structure 20 in that the structure body 21 and the support member 70 are replaced with a structure body 521 and support members 570A and 570B. The structure main body 521 differs from the structure main body 21 in that the fourth and fifth support parts 40 and 45 are replaced with fourth and fifth support parts 540 and 545. The fourth and fifth supporting parts 540 and 545 differ from the fourth and fifth supporting parts 40 and 45 in that through holes 41b and 46b are formed in the vertically extending parts 41 and 46, respectively. The through holes 41b, 46b are formed to penetrate the vertically extending portions 41, 46 in the front-rear direction in a rectangular shape. The support member 570A is different from the support member 70 in that the convex portions 72a and 72b are formed in a shape that can be inserted and fitted to at least about half of the through holes 41b and 46b (length in the front and back direction). is different. The support member 70B is formed so that at least its upper end portion has a mirror-like shape with the support member 70A with respect to a plane extending in the vertical direction and the left-right direction. In the structure 520, the supporting members 570A, 570B are fitted with bolts and nuts with the convex portions 72a, 72b of the supporting members 570A, 570B inserted and fitted into the through holes 41b, 46b from the back side and the front side. They are fixed to the vertically extending parts 41, 46 by being fastened to each other (and also to the vertically extending parts 41, 46) using fastening members such as the above.

In this way, the convex portions 72a and 72b of the support members 570A and 570B are fitted into the through holes 41b and 46b of the fourth and fifth support portions 540 and 545 of the structure main body 521. When the first support part 22 vibrates or the support members 570A, 570B and the fourth and fifth support parts 540, 545 vibrate, the force acting on the fastening member compared to the structure 20 causes the fourth, It is possible to further suppress relative positional deviation between the fifth support portions 540, 545 and the support members 570A, 570B. As a result, the support members 570A and 570B can more fully suppress relative displacement of the fourth and fifth support portions 540 and 545.

In the embodiment, the support member 70 of the structure 20 functions as a relative displacement suppressing section that suppresses relative displacement from occurring in the fourth and fifth supporting sections 40 and 45, and functions as a relative displacement suppressing section that suppresses relative displacement between the fourth and fifth supporting sections 40 and 45. 45 and functions as a sixth support part having a second pressure receiving part. The same applies to the support member 470 of the structure 420 and the support members 570A and 570B of the structure 520. However, the first member having the function of the relative displacement suppressing part and the second member having the function of the sixth support part may be configured as separate bodies. For example, in the structure 20, a first member (for example, a member corresponding to the upper half of the support member 70) is fixed to the fourth and fifth support parts 40 and 45 of the structure main body 21, and a second member is fixed to the first member. A member (for example, a member corresponding to the lower half of the support member 70) may be fixed.

In the embodiment, the structure 20 includes a structure body 21 and a support member 70, and is arranged in the direction shown in FIGS. 1 to 4 so that the pedestal part 73 of the support member 70 is supported by the base member, 1 to 4, and the upper left and right extending portions 24 of the first support portion 22 of the structure body 21 are supported by the base member. However, it is not limited to this. FIG. 11 is an external perspective view of a modified structure 620, and FIG. 12 is a top view of the structure 620. As shown in FIGS. 11 and 12, the structure 620 includes only the structure body 21 of the structure 20 in FIGS. 1 to 4 (excluding the support member 70). In this structure 620, the vertically extending portions 41 and 46 of the fourth and fifth support portions 40 and 45 of the structure body 21 are fixed to the wall portion 90 via a connecting portion 92 on the back side. Therefore, in the structure 620, the first support portion 22 (in particular, the upper left and right extending portions 24) functions as a first pressure receiving portion that receives one of the vertical pressing force and the reaction force due to the pressing force from the outside. do. Further, the wall portion 90 functions as a second pressure receiving portion that receives the other of the vertical pressing force and the reaction force due to the pressing force from the outside, and the fourth and fifth supporting portions 40 and 45 serve as the second pressure receiving portion. It is connected. Even in this case, the structure main body 21 of the structure 620 can achieve the same effects as the structure main body 21 of the structure 20 of the embodiment.

In the embodiment, it is assumed that the structure 20 is used. However, it is not limited to this. FIG. 13 is an external perspective view of a modified structure device 710, and FIG. 14 is a right side view of the structure device 710. As shown in FIGS. 13 and 14, the structure device 710 includes two structures 20A and 20B having the same configuration as the structure 20, and a plate member 94. The two structures 20A and 20B are arranged back to back and spaced apart from each other. The plate member 94 is fixed to the upper end surface 25 of the upper left-right extending portion 24 of each of the first support portions 22 of the structures 20A and 20B by a fastening member such as a bolt. As a result, in the structure device 710, the structures 20A and 20B are fixed to each other via the plate member 94. Therefore, it is possible to more fully suppress generation of force in the longitudinal direction in the entire structure device 710 including the structures 20A and 20B.

In the embodiment, the structure main body 21 of the structure 20 includes a first support part 22, a second support part 30, a third support part 32, a fourth support part 40, a fifth support part 45, and two first beams. parts 50a, 50b, two second beam parts 52a, 52b, two third beam parts 54a, 54b, two fourth beam parts 56a, 56b, one fifth beam part 60, one A sixth beam portion 62 is provided. However, it is not limited to this. FIG. 15 is a front view of a structure main body 821 of a modified example.

As shown in FIG. 15, the structure main body 821 has the points that the first support part 22 is replaced with the first support part 822, and the fourth and fifth support parts 40 and 45 are replaced with the fourth and fifth support parts 840. , 845, the connections between the fifth and sixth beam parts 60 and 62 are different, and the pillar parts 80 and 82 and the fifth and sixth beam parts 60c and 62c are added It is different from the main body 21.

The first support part 822 differs from the first support part 22 of the structure main body 21 in that the vertically extending part 23 is replaced with the vertically extending part 27 . A plurality of convex regions 27La and 27Ra are formed in pairs on the left end surface and right end surface of the vertically extending section 27 at intervals in the extending direction (vertical direction) of the vertically extending section 27. A plurality of teeth 27Lb and 27Rb are formed in each of the convex regions 27La and 27Ra, respectively, in line with the direction in which the vertically extending portion 27 extends.

The fourth and fifth supporting parts 840 and 845 differ from the fourth and fifth supporting parts 40 and 45 of the structure body 21 in that they further include left and right extending parts 43 and 48, respectively. The left and right extending portions 43 and 48 extend from the lower ends of the vertically extending portions 41 and 46 toward the left side and the right side (second and third support portions 30 and 32 sides), respectively, to the second and third support portions 30 and 48, respectively. 32 to a position spaced the same distance apart. A lower projecting portion 43a extending downward is formed at the left end portion (the end portion on the second support portion 30 side) of the left-right extending portion 43, and a lower projecting portion 43a extending downward is formed at the left end portion (the end portion on the second support portion 30 side) of the left-right extending portion 43. 3) is formed with a lower protrusion 48a extending downward. The lower projecting portion 43a overlaps with the upper projecting portion 42a when viewed in the vertical direction, and the lower projecting portion 48a overlaps with the upper projecting portion 47a when viewed in the vertical direction.

The pillar portions 80 and 82 are formed in a pair, and the vertically extending portions 27 of the first supporting portion 22 and the vertically extending portions 41 and 46 of the fourth and fifth supporting portions 840 and 845 are aligned in the left-right direction. It is located between and extends in the vertical direction. A plurality of convex regions 80a are formed on the right end surface (the end surface on the vertically extending portion 27 side) of the columnar portion 80 at intervals in the extending direction of the columnar portion 80. A plurality of teeth 80b are formed in each convex region 80a in a line in the extending direction of the column 80. A plurality of convex regions 82a are formed on the left end surface (the end surface on the vertically extending portion 27 side) of the columnar portion 82 at intervals in the extending direction of the columnar portion 82. A plurality of teeth 82b are formed in each convex region 82a in a line in the extending direction of the column 82.

The fifth and sixth beam portions 60 and 62 are connected to the vertically extending portion 23 of the first support portion 22 and the upper projecting portions 42a and 47a of the fourth and fifth support portions 40 and 45, respectively. It differs from the structure main body 21 in that it is connected to the upper end portions of the pillar portions 80, 82 and the upper overhang portions 42a, 47a instead of the structure body 21. The fifth and sixth beam portions 60 and 62 extend obliquely downward in a sine wave shape from the pillar portions 80 and 82 toward the upper projecting portions 42a and 47a, respectively.

The fifth and sixth beam parts 60c and 62c are formed in a pair, and are located at the lower ends of the pillar parts 80 and 82 and below the left and right extending parts 43 and 48 of the fourth and fifth support parts 840 and 845, respectively. It is connected to the lower end portions of the side projecting portions 43a and 48a. The fifth and sixth beam portions 60c and 62c, like the fifth and sixth beam portions 60 and 62, respectively, diagonally downward as they go from the column portions 80 and 82 side toward the lower overhang portions 43a and 48a. It extends in a sine wave shape on the side.

Here, a plurality of teeth 27Lb, 27Rb of each convex region 27La, 27Ra on the left end surface and right end surface of the vertically extending portion 27 of the first support portion 822, and each convex region 80a, 82a of the columnar portions 80, 82. The plurality of teeth 80b and 82b are respectively formed to permit downward relative movement of the column parts 80 and 82 with respect to the vertically extending part 27 by a predetermined force, and to restrict upward relative movement. There is. The predetermined force is determined as a force that is somewhat larger than the force with which the first support portion 822 attempts to move upward during vibration. That is, when the first support portion 822 vibrates in a state where the plurality of teeth 80b, 82b of each convex region 80a, 82a are in mesh with the plurality of teeth 80b, 82b of each convex region 80a, 82a, , the first support portion 822 (vertical extension portion 27) and the pillar portions 80, 82 are prevented from moving relative to each other in the vertical direction.

Next, preliminary adjustment before using the structure main body 821 of the example will be described. FIG. 16 shows the structure main body 821 when the column parts 80 and 82 are moved downward relative to the vertically extending part 27 of the first support part 822 from the state shown in FIG. 15 (when prestress is applied). ) is an explanatory diagram showing the situation. In this way, by moving the columnar parts 80, 82 downward relative to the vertically extending part 27, the two fifth beam parts 60, 60b and the two sixth beam parts 62, 62b are moved. The properties, and thus the properties of the structure body 821, can be changed. Specifically, the relationship between the downward load that the first support part 822 receives from the outside and the displacement (the amount of movement in the vertical direction) of the first support part 822 from the initial position can be changed. That is, the plurality of teeth 27Lb, 27Rb of the vertically extending portion 27 and the plurality of teeth 80b, 82b of the pillar portions 80, 82 correspond to the two fifth beam portions 60, 60b and the two sixth beam portions 62, It functions as a prestress section that applies prestress to 62b.

17 and 18 are explanatory diagrams showing an example of the characteristics of the structure main body 821. 17(A), FIG. 17(B), and FIG. 17(C) respectively show the amount of movement ( This is an example of the characteristics of the structure body 821 when the value (hereinafter referred to as "prestress displacement Dps") is 0, Dps1, and Dps2 (0<Dps1<Dps2).

In FIGS. 17(A), 17(B), and 17(C), the vertical axis represents the downward load that the first support part 822 receives from the outside, and the horizontal axis represents the initial position of the first support part 822. is the displacement from . In FIG. 17(A), FIG. 17(B), and FIG. 17(C), regarding the displacement (horizontal axis) of the first support portion 822, the low rigidity region Rqzs is different from the other regions (high rigidity regions R1, R2). This is a region where the absolute value of the rigidity of the structure body 821 is sufficiently lower than that of the structure body 821, and the high-rigidity regions R1 and R2 are regions where the displacement of the first support portion 822 is smaller and larger than the low-rigidity region Rqzs, respectively. This is the area of 17(A), FIG. 17(B), and FIG. 17(C), "Dqzs" is the median value of the low rigidity region Rqzs regarding the displacement of the first support part 822, and "Fqzs" is the This is the load that the first support part 822 receives when the displacement of the support part 822 is the value Dqzs (hereinafter referred to as "low-rigidity center load").

In FIG. 18, the vertical axis on the left side is the stiffness of the structure main body 821 (hereinafter referred to as "base rigidity Sb") when the load received by the first support part 822 is 0, and the vertical axis on the right side is the The rigid central load is Fqzs, and the horizontal axis is the prestress displacement Dps.

17(A), FIG. 17(B), FIG. 17(C), and FIG. 18, as the prestress displacement Dps increases, the low rigidity central load Fqzs decreases, and when the prestress displacement Dps is the value Dps, It can be seen that the low rigidity central load Fqzs has a value of 0. Furthermore, from FIG. 18, in a region where the prestress displacement Dps is greater than or equal to the value Dps2lo and less than or equal to the value Dps2hi (Dps2lo<Dps2<Dps2hi), the base stiffness Sb becomes the value Sbqzs of the low stiffness region Rqzs, and the prestress displacement Dps becomes the value Dps2lo. In the region where the prestress displacement Dps is greater than the value Dps2lo, the base stiffness Sb becomes the value Sb1 (Sb1>Sbqzs) of the high stiffness region R1, and in the region where the prestress displacement Dps is greater than the value Dps2lo, the base stiffness Sb becomes the value Sb2 (Sb2>Sb2>) of the high stiffness region R2. It can be seen that Sbqzs). Based on these considerations, the structure main body 821 can be used in a wider range of applications by determining an appropriate prestress displacement Dps according to various uses.

In the embodiments and modifications, the structure bodies 21, 121, 221, 321, 421, 521, and 821 are each configured as an integrally molded member. However, these may be formed as multiple parts and joined together. Further, the structure main body 21 and the like and the support member 70 and the like may be configured as an integrally molded member.

The correspondence between the main elements of the embodiments and the main elements of the present disclosure described in the section of means for solving the problems will be explained. In the embodiment, the first support part 22 corresponds to a "first support part", the second support part 30 corresponds to a "second support part", and the third support part 32 corresponds to a "third support part". However, the fourth support part 40 corresponds to a "fourth support part", the fifth support part 45 corresponds to a "fifth support part", and the two first beam parts 50a and 50b correspond to a "first positive rigidity". The two second beam portions 52a, 52b correspond to the “second positively rigid portion”, the two third beam portions 54a, 54b correspond to the “third positively rigid portion”, The two fourth beam parts 56a and 56b correspond to the "fourth positive rigidity part", one fifth beam part 60 corresponds to the "first negative rigidity part", and one sixth beam part 62 corresponds to the "first negative rigidity part". corresponds to the “second negative rigidity portion”.

Note that the correspondence between the main elements of the examples and the main elements of the present disclosure described in the column of means for solving the problems is the same as that of the present disclosure described in the column of means for solving the problems of the examples. Since this is an example for specifically explaining a mode for implementing the above, it is not intended to limit the elements of the present disclosure described in the column of means for solving the problems. In other words, the interpretation of the present disclosure described in the column of means to solve the problem should be made based on the description in that column, and the examples should be interpreted based on the description of the disclosure described in the column of means to solve the problem. This is just one specific example of disclosure.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments in any way, and may be modified in various forms without departing from the gist of the present disclosure. Of course, it can be implemented.

[Additional notes]
[1] The structure of the present disclosure includes a first pressure receiving part that receives one of an external pressing force and a reaction force due to the pressing force, and a second pressure receiving part that receives the other of the pressing force and the reaction force. a first support portion having the first pressure receiving portion and at least a portion extending in a predetermined direction; and a structure spaced apart on both sides with respect to the first support portion; a pair of second and third support parts extending in the predetermined direction; the second pressure receiving part; and located between the first support part and the second and third support parts; a pair of fourth and fifth support portions extending in the predetermined direction, the first support portion and the second and third support portions, the first pressure receiving portion and the second pressure receiving portion; N1 (N1≧2) first and second positively rigid parts each having positive rigidity in a given relative displacement range in the predetermined direction; 4, the N1 third, each pair connected to the fifth support part and having positive rigidity in any relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction; A fourth positively rigid part, connected to the first support part and the fourth and fifth support parts, and a relative predetermined displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. and a structure main body having N2 (N2≧1) first and second negative stiffness portions each having a negative stiffness, the structure main body being formed as a planar member. This is the summary.

The structure of the present disclosure includes a first rigid frame structure including a first support part, a second support part, and N1 first positively rigid parts; and a second rigid frame structure formed by a pair of parts. Further, a third rigid frame structure including a second support part, a fourth support part, and N1 third positively rigid parts, and a fourth rigid frame structure including a third support part, a fifth support part, and N1 fourth positively rigid parts. It is composed of a pair of Ramen structures. From these, when the first pressure receiving part receives one of an external pressing force and a reaction force due to the pressing force and the first supporting part (first pressure receiving part) vibrates in a predetermined direction, the first supporting part ( It is possible to prevent the first pressure receiving part from tilting toward the second support part or the third support part with respect to a predetermined direction. In addition, when the second pressure receiving part receives the other of the external pressing force and the reaction force due to the pressing force and the fourth and fifth supporting parts (second pressure receiving part) vibrate in a predetermined direction, the second supporting part (second pressure receiving part) can be prevented from tilting toward the second support part or the third support part with respect to a predetermined direction. Therefore, N2 first and second negative rigid parts are connected to the first support part (first pressure receiving part) and the fourth and fifth support parts respectively. Negative rigidity can be more appropriately exhibited within a predetermined displacement range relative to the fifth support portion (second pressure receiving portion) in a predetermined direction. As a result, in a predetermined relative displacement range in a predetermined direction between the first support part (first pressure receiving part) and the fourth and fifth support parts (second pressure receiving part), the absolute value is higher than in other displacement ranges. Low rigidity can be more appropriately achieved.

Moreover, in the structure of the present disclosure, the first, second, third, fourth, and fifth supporting parts, the N1 first, second, third, and fourth positively rigid parts, and the N2 positive rigid parts, respectively, are provided. 1. The structure main body having the second negative rigidity portion is formed as a planar member. As a result, when the fourth and fifth supporting parts connected to the first supporting part having the first pressure receiving part and the second pressure receiving part vibrate in a predetermined direction, compared to the case where the member is not formed as a planar member, , these can be suppressed from tilting in a direction perpendicular to the extending direction of the structure main body. Further, the length in the direction orthogonal to the extending direction of the structure main body can be shortened.

[2] In the above structure (the structure according to [1]), the N1 first positive rigid parts, the N1 third positive rigid parts, and the N2 first negative rigid parts. means that the N1 second positive rigidity portions, the N1 fourth positive rigidity portions, and the N2 second negative rigidity portions partially overlap when viewed in the predetermined direction. They may partially overlap when viewed in the predetermined direction. In this way, it is possible to reduce the length in the direction perpendicular to the predetermined direction among the extending directions of the structure main body.

[3] In the structure in this case (the structure according to [2]), the fourth and fifth supporting parts have the second pressure receiving part and the first and the fifth supporting parts extend in the predetermined direction. and third and fourth column parts extending from the ends of the first and second column parts in the predetermined direction toward the second and third support parts, the third and fourth column parts; The fourth positive rigidity section is connected to the second and third support sections and the first and second pillar sections, and the first and second negative rigidity sections are connected to the first support section and the first and second columnar sections. 3. It may be connected to the end portions of the fourth pillar portion on the second and third support portion sides.

[4] In the structure in this case (the structure according to [3]), the end faces of the first and third column parts on the first negative rigidity part side extend from the second support part side to the first It is formed to be inclined toward the side opposite to the first negative rigidity part side as it goes toward the support part side, and the end surfaces of the second and fourth pillar parts on the second negative rigidity part side are It may be formed to be inclined toward the side opposite to the second negative rigidity portion as it goes from the support portion side toward the first support portion side. In this way, while ensuring the strength of the fourth and fifth supporting parts, contact between the first negative rigidity part and the first and third pillar parts and the second negative rigidity when the first supporting part moves in a predetermined direction can be ensured. Contact between the rigid portion and the second and fourth pillar portions can be suppressed. As a result of the latter, the movable range of the first and second negative rigid parts and, in turn, the movable range of the first support part in the predetermined direction can be made larger.

[5] In the structure described above (the structure according to any one of [1] to [4]), relative displacement suppression that suppresses relative displacement from occurring in the fourth and fifth support parts. It is also possible to further include a section. In this way, relative displacement between the fourth and fifth support parts can be suppressed.

[6] In the structure in this case (the structure according to [5]), the fourth and fifth support portions have first and second recesses or first and second through holes, and the The displacement suppressing portion includes a base and first and second convex portions extending in a pair from the base, and the first and second convex portions are connected to the first and second concave portions or the first and second convex portions. It may be fixed to the fourth and fifth support portions while being fitted into the through holes.

[7] In the above-described structure (the structure according to any one of [1] to [6]), the fourth support portion supports the fourth and fifth support portions and has the second pressure receiving portion. 6 support parts may be further provided.

[8] In the above structure (the structure according to any one of [1] to [7]), applying prestress to each of the N2 first and second negative rigid parts. It may further include a prestress section. In this way, the characteristics of the first and second negative rigid portions and, by extension, the characteristics of the structure can be changed.

[9] In the structure described above (the structure according to any one of [1] to [8]), at least the structure main body of the structure may be integrally molded. good.

20, 20A, 20B, 420, 520, 620 Structure, 21, 121, 221, 321, 421, 521, 821 Structure body, 22 First support part, 30 Second support part, 32 Third support part, 40 Fourth support part, 41a, 46a Recessed part, 41b, 46b Through hole, 45 Fifth support part, 50a, 50b First beam part (first positively rigid part), 52a, 52b Second beam part (21st positively rigid part ), 54a, 54b third beam part (third positive rigidity part), 56a, 56b fourth beam part (fourth positive rigidity part), 60 fifth beam part (first negative rigidity part), 62 sixth beam part (second negative rigidity part), 70, 70A, 70B support member (relative displacement suppressing part and sixth support part).

Claims (9)

A first pressure receiving part that receives one of an external pressing force and a reaction force due to the pressing force, and a second pressure receiving part that receives the other of the pressing force and the reaction force, or the second pressure receiving part A structure connected to a part,
a first support portion having the first pressure receiving portion and at least a portion extending in a predetermined direction;
a pair of second and third support parts spaced apart on both sides with respect to the first support part and extending in the predetermined direction;
a pair of fourth and fifth support parts connected to the second pressure receiving part, located between the first support part and the second and third support parts, and at least partially extending in the predetermined direction; and,
A pair connected to the first support part and the second and third support parts and having positive rigidity in any relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. N1 (N1≧2) first and second positively rigid parts, respectively;
It is connected to the second and third support parts and the fourth and fifth support parts, and has positive rigidity in any relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. each of the N1 third and fourth positively rigid parts in a pair having;
A pair connected to the first support part and the fourth and fifth support parts and having negative rigidity in a predetermined relative displacement range of the first pressure receiving part and the second pressure receiving part in the predetermined direction. N2 (N2≧1) first and second negative rigid parts, respectively;
comprising a structure body having
The structure main body is formed as a planar member.
Structure. The structure according to claim 1,
The N1 first positive rigid parts, the N1 third positive rigid parts, and the N2 first negative rigid parts partially overlap when viewed in the predetermined direction,
The N1 second positive rigid portions, the N1 fourth positive rigid portions, and the N2 second negative rigid portions partially overlap when viewed in the predetermined direction;
Structure. The structure according to claim 2,
The fourth and fifth support portions include first and second column portions that have the second pressure receiving portion and extend in the predetermined direction, and end portions of the first and second column portions in the predetermined direction. and third and fourth pillar portions extending from the second support portion to the second and third support portion sides,
The third and fourth positively rigid parts are connected to the second and third support parts and the first and second pillar parts,
The first and second negative rigid parts are connected to the first support part and the ends of the third and fourth pillar parts on the second and third support part sides,
Structure. 4. The structure according to claim 3,
The end faces of the first and third column parts on the first negative rigidity part side are inclined toward the opposite side from the first negative rigidity part side as they go from the second support part side to the first support part side. It is formed like this,
The end faces of the second and fourth column parts on the second negative rigidity part side are inclined toward the opposite side to the second negative rigidity part as they go from the third support part side to the first support part side. It is formed like this,
Structure. The structure according to claim 1,
further comprising a relative displacement suppressing part that suppresses relative displacement from occurring in the fourth and fifth supporting parts;
Structure. The structure according to claim 5,
The fourth and fifth support portions have first and second recesses or first and second through holes,
The relative displacement suppressing portion includes a base and first and second convex portions extending as a pair from the base, and the first and second convex portions are connected to the first and second concave portions or the first and second convex portions. fixed to the fourth and fifth supporting parts in a state fitted into the second through hole;
Structure. The structure according to claim 1,
further comprising a sixth support part that supports the fourth and fifth support parts and has the second pressure receiving part;
Structure. The structure according to claim 1,
Further comprising a prestressing part that applies prestress to each of the N2 first and second negative rigid parts,
Structure. The structure according to claim 1,
At least the structure main body of the structure is integrally molded,
Structure.

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